What is the difference between A1 and a1m?

A1(M) is the designation given to a series of four separate motorway sections in England. Each section is an upgrade to a section of the A1, a major north–south road which connects London, the capital of England, with Edinburgh, the capital of Scotland.



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Answer. Answer: A motorway just relates to the A road that it's relieving pressure from. The reason there is no M7 is that the A7, which runs from Carlisle to Edinburgh has no need for a motorway to relieve it.

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Somewhere to the east of Glasgow lies the A8(M) - but look carefully, because it's not easy to find. The A8(M) is the UK's shortest motorway, running for just over 280 metres (308 yards). It forms a link between two roundabouts at Baillieston Interchange, better known as the junction between the M8 and M73.

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At 231 miles (370km), the M6 is the UK's longest motorway. It runs from Catthorpe (junction 19 on the M1) to the Scottish Border. The M62 is the highest motorway in the UK. It reaches 1,220ft (372m) near the Pennine Way footbridge.

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Drivers have rated the M5 the best motorway in England for 2023 – and the A303 the best road.

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Britain's first motorway, the Preston by-pass, opened in 1958. Designed by Lancashire County Council under civil engineer Sir James Drake – regarded as the pioneer of the UK motorway network – it's now part of the M6. The next 10 years saw UK's network expand as hundreds of miles of motorway were built.

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